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Bad and cracking sound

Hello, I'm the owner of a SONY Amplifier TA-F419R. Since a couple of months I don't get any more clear sound. Very quickly after I turn the amplifier on and select a sound source , I start to hear a cracking sound put onto the music signal and the music volume is strongly reduced. Wathever connection I use, or whatever setting with respect to Bass, Balance, Speakers, etc. I always get the same result. Even when using the headphone jack, it gives the same result. Might someone be able to indicate me if this is fixable and in what way, or if I will need to buy myself a new one?

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  • Dimitri VN May 28, 2009

    Thank you for your feedback Grubhead.  I indeed have the problem on both channels.  I already took the cover off, dusted everything (something which was clearly necessary) and looked for anything abnormal/burnt.  Unfortunately so far I haven't seen anything out of the ordinary.  I'll check your suggestion on the IC.  Right now I have a large aluminium heatsink sitting centrally in the amplifier.  I'll have a look tonight on which components are connected to it for thermal management.



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By the sound of it the noise is in both channels yes? If so then it is caused by something that is common to both channels. The cost of repair will depend on if you can fix it yourself, or if the parts are expensive or even available, to yourself or a repair person. You can determine some of it yourself by taking the cover off. If you see on a metal heat-sink a black IC with a load of pins coming out of it (often with the letters STK and numbers) then that might be the cause. If you see transistors on the sink then it's likely to be something else.
Take a look around and see if you can see something burnt or not normal. It won't cost you anything. Make certain the plugs out!
If you do see that IC with the number Google it! You'll get an idea of cost, even if you send it for repair!

Posted on May 27, 2009


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